EP0235588A1 - Procédé pour éliminer la croûte de laitier se formant lors de l'oxycoupage au chalumeau - Google Patents

Procédé pour éliminer la croûte de laitier se formant lors de l'oxycoupage au chalumeau Download PDF

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Publication number
EP0235588A1
EP0235588A1 EP19870101340 EP87101340A EP0235588A1 EP 0235588 A1 EP0235588 A1 EP 0235588A1 EP 19870101340 EP19870101340 EP 19870101340 EP 87101340 A EP87101340 A EP 87101340A EP 0235588 A1 EP0235588 A1 EP 0235588A1
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EP
European Patent Office
Prior art keywords
cutting
slag
torch
beard
kerf
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19870101340
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German (de)
English (en)
Other versions
EP0235588B1 (fr
Inventor
Karlheinz Schmunck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messer Griesheim GmbH
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Messer Griesheim GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0235588A1 publication Critical patent/EP0235588A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
    • B23K7/003—Machines, apparatus, or equipment for cutting long articles, e.g. cast stands, plates, in parts of predetermined length

Definitions

  • the invention relates to a method for removing the slag beard formed during flame cutting.
  • the continuous casting produced is divided.
  • slag whiskers are created along the cutting line, on the underside of the continuous castings, the subsequent removal of which causes high additional costs in the production of continuous castings due to the time and machinery involved.
  • the slag beard is melted and removed by means of a burner arrangement consisting of a plurality of burners, the burners partially enclosing the edge carrying the slag beard, i. H. are directed towards the underside and cut surface. In both cases, the slag beard is melted by one or more burners in the area of the workpiece where it is visibly present.
  • the invention has for its object to provide an economical method for quick removal of slag whiskers in line, d. H. during the cutting or immediately afterwards, with which a small cutting chamfer is achieved without new slag whiskers.
  • the slag beard is separated at the metallic connection with the base material in the lower region of the kerf by the horizontal cutting out again with an additional burner and a corresponding cutting nozzle (wide kerf). This can always be done shortly before the cut is finished, either during the cutting process or by briefly interrupting the cutting process.
  • This method should preferably be used on billets or blocks (T00! P / 250 to 400 mm wide), but the method can be used up to materials from 2100 to 2400 mm wide.
  • the advantages achieved by the invention are the increase in the cutting speed when removing the slag whiskers.
  • the reduction in the main time achieved in this way achieves an economical removal of the flax beard and, moreover, a practicable solution which works fully automatically in operation.
  • FIG. 1 an additional cutting torch 10, in particular an oxyacetylene cutting torch, for removing slag beard 11a, 11b firmly connected to continuous castings 12a, 12b (see also FIG. 2) is shown schematically.
  • Continuous castings 12a, 12b are understood here to mean all parts hot or cold-cut in continuous casting plants, such as billets, billets and slabs.
  • the Stranggußanla e g usually multiple lengths cut from, for example, 8000 mm, which are then further divided on a running roller by flame cutting machines.
  • the continuous castings 12 are cross-divided lengthwise or in the direction of the arrow 14 using a main cutting torch 13. This creates a cutting slag that flows downward along the cutting surfaces 13a and 13b during the cutting (see FIG. 2).
  • the cutting slag flows due to the adhesion around the lower edge of the continuous casting 12 in the direction of the underside 15 of the workpiece.
  • the so-called slag beard 11a, 11b forms along the kerf 14 on the underside 15.
  • the slag beard 11a, 11b consists of a "mixture" of iron oxide and iron, the percentage of pure iron generally being lower than the percentage of iron oxide. With its predominant amount of material, the slag beard 11 is assigned to the underside 15a, 15b of the workpiece relatively "loosely", ie there is only a slight adhesive connection between the slag beard 11 and the underside 15a, 15b of the workpiece.
  • a thin metal film 17a, 17b with a high iron content forms in the area 16a, 16b of the cut surface 13a, 13b during the flame cutting process, which is firmly connected to the base material of the cut surface 13a, 13b is and passes into the slag beard 11a, 11b.
  • the slag beard is firmly connected to the workpiece, namely in the area 16a, 16b of the cut surface 13a, 13b.
  • the slag beard 11a, 11b is removed with the additional cutting torch 10, which is held in a guide device 20.
  • the cutting jet (cutting oxygen jet and preheating flames) 18 is directed parallel to the underside 15a, 15b of the workpiece.
  • the cutting kerf 14 is cut again, the area 16a, 16b is separated from the cutting surfaces 13a, 13b and a geometry is formed 3 from.
  • the additional cutting torch 10 can also be partially positioned directly over the area 16a, 16b (see FIG. 3), so that the slag beard 11a, 11b is separated off during the subsequent piercing / piercing process. A movement of the additional cutting torch in the direction of arrow 19 is unnecessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Laser Beam Processing (AREA)
EP19870101340 1986-03-06 1987-01-31 Procédé pour éliminer la croûte de laitier se formant lors de l'oxycoupage au chalumeau Expired - Lifetime EP0235588B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863607285 DE3607285A1 (de) 1986-03-06 1986-03-06 Verfahren zum entfernen des beim brennschneiden entstehenden schlackebartes
DE3607285 1986-03-06

Publications (2)

Publication Number Publication Date
EP0235588A1 true EP0235588A1 (fr) 1987-09-09
EP0235588B1 EP0235588B1 (fr) 1990-06-06

Family

ID=6295596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870101340 Expired - Lifetime EP0235588B1 (fr) 1986-03-06 1987-01-31 Procédé pour éliminer la croûte de laitier se formant lors de l'oxycoupage au chalumeau

Country Status (2)

Country Link
EP (1) EP0235588B1 (fr)
DE (1) DE3607285A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923527A (en) * 1989-03-14 1990-05-08 Messer Griesheim Industries, Inc. Apparatus and method for slag-free cutting of billets and the like
FR2826600A1 (fr) * 2001-07-02 2003-01-03 Guy Prioretti Procede d'oxycoupage d'une piece d'acier, et dispositif de mise en oeuvre dudit procede

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839515B1 (de) * 1978-09-11 1980-02-21 Schmitz Soehne Gmbh J H Duesenanordnung zum Verhindern des Niederschlags von Brennschlacken entlang der Schnittfugenunterkante beim Brennschneiden
EP0017807A1 (fr) * 1979-04-11 1980-10-29 Thyssen Aktiengesellschaft vorm. August Thyssen-Hütte Procédé pour évites la formation des bavures lors du découpage au chalumeau des produits métalliques et dispositif pour sa mise en oeuvre
DE2925419A1 (de) * 1979-06-23 1981-01-08 Ipu Ltd Verfahren und vorrichtung zur herstellung bartfreier stranggusstuecke
EP0074474A2 (fr) * 1981-09-11 1983-03-23 Messer Griesheim Gmbh Arrangement d'un chalumeau à écrouter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2349387A1 (fr) * 1976-04-30 1977-11-25 Somafer Sa Procede ameliore de decoupage des produits metallurgiques de forte epaisseur
DE2831152A1 (de) * 1978-07-15 1980-01-24 Ipu Ltd Verfahren zum herstellen bartfreier stranggusstuecke und vorrichtung zur durchfuehrung
AU547337B2 (en) * 1981-01-27 1985-10-17 Kawasaki Steel Corp. Dividing slabs from continuous casting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839515B1 (de) * 1978-09-11 1980-02-21 Schmitz Soehne Gmbh J H Duesenanordnung zum Verhindern des Niederschlags von Brennschlacken entlang der Schnittfugenunterkante beim Brennschneiden
EP0017807A1 (fr) * 1979-04-11 1980-10-29 Thyssen Aktiengesellschaft vorm. August Thyssen-Hütte Procédé pour évites la formation des bavures lors du découpage au chalumeau des produits métalliques et dispositif pour sa mise en oeuvre
DE2925419A1 (de) * 1979-06-23 1981-01-08 Ipu Ltd Verfahren und vorrichtung zur herstellung bartfreier stranggusstuecke
EP0074474A2 (fr) * 1981-09-11 1983-03-23 Messer Griesheim Gmbh Arrangement d'un chalumeau à écrouter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923527A (en) * 1989-03-14 1990-05-08 Messer Griesheim Industries, Inc. Apparatus and method for slag-free cutting of billets and the like
FR2826600A1 (fr) * 2001-07-02 2003-01-03 Guy Prioretti Procede d'oxycoupage d'une piece d'acier, et dispositif de mise en oeuvre dudit procede
EP1273378A1 (fr) * 2001-07-02 2003-01-08 Guy Prioretti Procédé d'oxycoupage d'une pièce d'acier et dispositif de mise en oeuvre dudit procédé
US6824624B2 (en) 2001-07-02 2004-11-30 Guy Prioretti Method of oxygen cutting a piece of steel, and apparatus for implementing said method

Also Published As

Publication number Publication date
DE3607285C2 (fr) 1989-02-02
EP0235588B1 (fr) 1990-06-06
DE3607285A1 (de) 1987-09-10

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